Method for inspecting a facility, preferably a conveying facility

An inspection system for inspecting a conveying facility, the system comprising:

• at least one drone to capture both optical and acoustic data;
• an RGB camera;
• a plurality of acoustic sensors, and
• at least one control unit configured to:
• capture optical data from a plurality of rollers of the facility (19) using the RBG camera and the infrared camera;
• capture (100b) acoustic data from the plurality of rollers using the plurality of acoustic sensors;
• jointly evaluate the captured optical data and the captured acoustic data to determine conditions for the plurality of rollers;
• and
• wherein the plurality of acoustic elements are located on the conveying facility and the infrared camera is located on a drone.